/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.explorer.ui;

import org.activiti.engine.ActivitiException;
import org.activiti.explorer.Environments;


/**
 * @author Joram Barrez
 */
public abstract class NoParamComponentFactory<T> implements ComponentFactory<T> {

    protected Class<? extends T> clazz;

    public void initialise(String environment) {
        if (environment.equals(Environments.ALFRESCO)) {
            clazz = getAlfrescoComponentClass();
        } else {
            clazz = getDefaultComponentClass();
        }
    }

    public T create() {
        try {
            return clazz.newInstance();
        } catch (Exception e) {
            throw new ActivitiException("Couldn't instantiate class " + clazz, e);
        }
    }

    protected abstract Class<? extends T> getAlfrescoComponentClass();

    protected abstract Class<? extends T> getDefaultComponentClass();

}
